125630865 has 32 divisors (see below), whose sum is σ = 223977600. Its totient is φ = 66813120.

The previous prime is 125630809. The next prime is 125630909. The reversal of 125630865 is 568036521.

125630865 is a `hidden beast` number, since 12 + 5 + 630 + 8 + 6 + 5 = 666.

It is not a de Polignac number, because 125630865 - 2¹⁷ = 125499793 is a prime.

It is a super-3 number, since 3×125630865³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55455 + ... + 57675.

It is an arithmetic number, because the mean of its divisors is an integer number (6999300).

Almost surely, 2^125630865 is an apocalyptic number.

125630865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125630865 is a deficient number, since it is larger than the sum of its proper divisors (98346735).

125630865 is a wasteful number, since it uses less digits than its factorization.

125630865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654 (or 2648 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 125630865 is about 11208.5175201719. The cubic root of 125630865 is about 500.8397422098.

The spelling of 125630865 in words is "one hundred twenty-five million, six hundred thirty thousand, eight hundred sixty-five".